Smithville, in New Jersey, United States, is home to roughly 7,200 people in the Eastern Time Zone at 39.5°N latitude.
In 2025, Smithville recorded an average annual temperature of 55°F — right at the 30-year normal of 56°F. The hottest day reached 97°F in June; the coldest was 13°F in January. Total precipitation was 46 inches (wetter than usual). The wettest month was July.
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